HI!
LOOKING FOR AN OTG FPV RX THAT U HOOK TO YOUR SMARTPHONE TO DISPLAY THE LIVE FEED.
LINK PROVIDED FOR REFERENCE

http://www.sp4mm3r.com/receiver-android-phone.html
NEED A USED ONE IN GOOD CONDITION.
CONTACT ME OVER WHATSAPP@ 9868157838
REGARDS.
SOHAM

https://www.banggood.com/5_8G-32CH-OTG-FPV-Receiver-for-Smart-Phone-PC-Monitor-p-1119506.html

hi you can buy form quadkopters.com
here is the link...

http://www.quadkopters.com/product/fpv-kit-and-accessories/usb-otg-receiver/